Tahini Billionaire Bars

For the seventh recipe in the Basically Guide to Better Baking, we took the millionaire bar—shortbread plus caramel plus chocolate (think of it like an oversized Twix)—and gave it an upgrade with sesame seeds and tahini. The shortbread is tender, the filling is gooey, and the chocolate ties it all together. Be sure to give the tahini a good stir with a butter knife or mini offset spatula before you whisk it into the butterscotch—it has a tendency to separate. (It helps if you buy the good stuff. We love Soom brand!) Slice the finished bars into pieces using a serrated knife so that you can saw through the layers rather than smoosh them. If you're still having trouble, just stick them in the freezer until the butterscotch is firm enough to easily slice. More questions? Head to our forum where we're eager to help.